diff options
Diffstat (limited to 'bfd/elf32-ppc.c')
| -rw-r--r-- | bfd/elf32-ppc.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c index f7c0366..d8e6108 100644 --- a/bfd/elf32-ppc.c +++ b/bfd/elf32-ppc.c @@ -6831,6 +6831,62 @@ ppc_elf_relax_section (bfd *abfd, else continue; + /* If this branch is to __tls_get_addr then we may later + optimise away the call. We won't be needing a long- + branch stub in that case. */ + if (link_info->executable + && !link_info->relocatable + && h == htab->tls_get_addr + && irel != internal_relocs) + { + unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info); + unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info); + unsigned int tls_mask = 0; + + /* The previous reloc should be one of R_PPC_TLSGD or + R_PPC_TLSLD, or for older object files, a reloc + on the __tls_get_addr arg setup insn. Get tls + mask bits from the symbol on that reloc. */ + if (t_symndx < symtab_hdr->sh_info) + { + bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); + + if (local_got_offsets != NULL) + { + struct plt_entry **local_plt = (struct plt_entry **) + (local_got_offsets + symtab_hdr->sh_info); + char *lgot_masks = (char *) + (local_plt + symtab_hdr->sh_info); + tls_mask = lgot_masks[t_symndx]; + } + } + else + { + struct elf_link_hash_entry *th + = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info]; + + while (th->root.type == bfd_link_hash_indirect + || th->root.type == bfd_link_hash_warning) + th = (struct elf_link_hash_entry *) th->root.u.i.link; + + tls_mask + = ((struct ppc_elf_link_hash_entry *) th)->tls_mask; + } + + /* The mask bits tell us if the call will be + optimised away. */ + if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 + && (t_rtype == R_PPC_TLSGD + || t_rtype == R_PPC_GOT_TLSGD16 + || t_rtype == R_PPC_GOT_TLSGD16_LO)) + continue; + if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 + && (t_rtype == R_PPC_TLSLD + || t_rtype == R_PPC_GOT_TLSLD16 + || t_rtype == R_PPC_GOT_TLSLD16_LO)) + continue; + } + sym_type = h->type; } |